JP6663564B2 - Exterior structure of heat pump unit - Google Patents

Description

  The present invention relates to an exterior structure of a heat pump unit, and more particularly to an exterior structure of a heat pump unit configured so that an outer surface of a side plate is not damaged at a lower end of a peripheral portion of a top plate.

As an exterior structure of the heat pump unit, a tray-shaped bottom plate portion opened upward, a tray-shaped top plate portion opened downward, and a side plate portion connecting the bottom plate portion and the top plate portion are formed in a box shape. May be adopted. The bottom plate, top plate and side plate are made of painted steel plate.
At the upper end of the side plate portion, an upper end displacement plate portion which is displaced inward about the same as the thickness of the peripheral portion of the top plate portion via the step portion is formed, and the peripheral portion of the top plate portion is moved to the upper end displacement plate. It is engaged with the part in an external fitting manner and fixed with a plurality of screws.

  In many cases, the heat pump unit is packaged in such a manner that a lower packing material for packing the lower part of the heat pump unit and an upper packing material for packing the upper part of the heat pump unit are tied with two vertically wound packing tapes. In this case, when transporting the heat pump unit in a state where the packed heat pump units are stacked in two or three layers vertically, the weight (load) of the heat pump units stacked on the upper side is placed on the exterior structure of the heat pump unit. Will work.

  The exterior case of the air conditioner of Patent Literature 1 has a front plate, a back plate, and a top plate, a step portion and a plurality of convex portions are formed at an upper end portion of the back plate, and a lower end of a peripheral wall portion of the top plate portion. A curling portion bent inward in a U-shape is formed in the portion, and a portion near the end face of four corners R of the curling portion is formed in a saw blade shape. The curling portion of the peripheral wall of the top plate is engaged with the upper end of the back plate to engage with the plurality of projections, and the holding force is exerted by the elastic force of the saw blade portion.

Japanese Patent No. 2950063

  When transporting the packed heat pump units in a stacked state of two or three levels, a load acts on the top plate and the top plate is elastically deformed downward, so the lower end of the peripheral edge of the top plate The part touches the step at the upper end of the side plate part in a pressurized manner, and in this state, the vibration acts, damaging the coating on the step (painted steel sheet), and then coating during the use of the heat pump unit. There was a problem that rust was generated from the damaged part of the wrench.

  Here, in the straight portion where the step portion extends linearly, when a load is applied to the step portion from the lower end portion of the peripheral portion of the top plate portion, the upper end portion of the side plate portion and the step portion are easily displaced inward. The coating film is not easily damaged. Moreover, by inserting a synthetic resin film piece from below between the step portion of the side plate portion and the peripheral portion of the top plate portion and fixing it with a fixing tape, damage to the coating film could be prevented.

  However, at the four corners, when a load is applied to the step from the peripheral edge of the top plate, the upper end of the side plate and the step are not displaced inward, so that the coating film is easily damaged.

  Especially at the corners, it is not possible to insert a synthetic resin film piece from below between the step portion of the side plate portion and the peripheral portion of the top plate portion like a straight portion, so it is necessary to attach the film piece at the assembly stage In addition, in order to remove the film piece after the heat pump unit is installed, it is necessary to remove the top plate from the side plate, so that this method is costly and cannot be adopted at all.

  The technique of forming curling on the peripheral edge of the top plate portion of Patent Document 1 is not practical because the production cost is high in spite of the demand for miniaturization of the device.

  An object of the present invention is to provide an exterior structure of a heat pump unit that can prevent a step portion of a side plate portion from being damaged by a peripheral edge portion of a top plate portion with a simple structure.

  The exterior structure of the heat pump unit according to claim 1 includes a tray-like bottom plate that opens upward, a tray-like top plate that opens downward, and a side plate that connects the bottom plate and the top plate. In the exterior structure of the heat pump unit configured in a box shape, a fixing portion for fixing an upper end portion of the side plate portion and a peripheral edge portion of the top plate portion includes an upper end portion of the side plate portion via a step portion. An upper end displacement plate portion displaced inward is provided, and a peripheral portion of the top plate portion is formed so as to cover the upper end displacement plate portion from the outside, and a lower end portion of a corner peripheral portion of the top plate portion. A notch is formed in the notch.

  According to a second aspect of the present invention, in the exterior structure of the heat pump unit, the height of the notch is greater than a bending radius of the step.

  The exterior structure of the heat pump unit according to a third aspect is characterized in that, in the invention according to the first or second aspect, the notch is formed to extend by a predetermined length on both sides of the peripheral edge of the corner.

  According to the invention of claim 1, the exterior structure of the heat pump unit is formed in a box shape from the bottom plate, the top plate, and the side plate, and the upper end of the side plate and the peripheral edge of the top plate are fixed. The fixed portion to be provided is provided with an upper end displacement plate portion in which an upper end portion of the side plate portion is displaced inward through a step portion, and a peripheral portion of the top plate portion covers the upper end displacement plate portion from outside. Since the cutout portion is formed at the lower end of the peripheral edge of the corner of the top plate, the following effects can be obtained.

  Even when a load is applied to the top plate from above during transportation of the heat pump units stacked in a plurality of stages in the packed state and the peripheral portion of the top plate is displaced downward due to elastic deformation of the top plate, Since the notch is formed at the lower end of the corner portion of the top plate portion, the lower end portion of the corner portion does not contact the step portion of the side plate portion, so that the coating film of the step portion is not damaged. Absent.

  According to the invention of claim 2, since the height of the notch is a height equal to or greater than the bending radius of the step, even if vibration is repeatedly applied during transportation, the lower end of the corner peripheral edge is There is no contact with the step of the side plate.

  According to the third aspect of the present invention, since the notch is formed to extend by a predetermined length on both sides of the corner periphery, the upper end displacement plate portion of the side plate portion in the vicinity of the corner periphery. Even if the step portion is not easily displaced inward, a cutout portion corresponding to that portion is formed, so that the coating film on the step portion is not damaged.

It is a perspective view of the heat pump unit concerning the example of the present invention. FIG. 2 is an exploded perspective view of a part of a heat pump unit and a main part of an exterior structure thereof. It is an enlarged view of the A section of FIG. FIG. 4 is a perspective view showing a state in which a top plate is removed from the state of FIG. 3. FIG. 5 is a sectional view taken along line VV of FIG. 3. FIG. 6 is a sectional view taken along line VI-VI of FIG. 3. It is an enlarged view of the step part of FIG.

  Hereinafter, embodiments for carrying out the present invention will be described based on examples.

  The heat pump unit 1 according to the present embodiment forms a heat pump circuit by connecting a compressor, a condensation heat exchanger, an expansion valve, and an evaporative heat exchanger by refrigerant piping, and forms a heat pump between the refrigerant sealed in the refrigerant piping and the outside air. Is a device for heating hot and cold water by utilizing the above, and these devices are unitized and housed in an exterior structure 2 (hereinafter, referred to as an exterior case 2).

As shown in FIGS. 1 and 2, the outer case 2 has a rectangular parallelepiped shape made of a thin painted steel plate, has an air inlet formed on a back surface, and has a blower fan 3 of an evaporative heat exchanger on a front surface. An air outlet 4 facing the front surface is formed, and a pipe connection portion 5 is formed on the right side surface.
The outer case 2 is formed in a box shape from a tray-shaped bottom plate 10 opened upward, a tray-shaped top plate 11 opened downward, and a side plate 12 connecting the bottom plate 10 and the top plate 11. It is configured.

The side plate portion 12 includes a front side plate portion 12a that covers a portion other than the air outlet on the front side surface, a left side plate portion 12b that covers the left side surface, and a right rear side plate portion 12c that covers the right side portion of the right side and the rear side.
A condensing heat exchanger (not shown) is accommodated between the top plate 11 and the horizontal partition plate 13 below the top plate 11, and a part of the bottom plate 10, a part of the top plate 11, a right rear side plate 12c, A machine room (not shown) such as a compressor, an expansion valve, and a refrigerant pipe is accommodated in the machine room partitioned by the vertical partition plate 14.

As shown in FIGS. 1, 3, and 5, a curved portion 11 a and a vertical peripheral portion 11 b having a predetermined vertical width connected to a lower end of the curved portion 11 a are formed on an outer peripheral portion of the top plate portion 11. I have.
An upper end displacement plate portion 12e in which the upper end portion of the side plate portion 12 is displaced inward via the step portion 16 is formed on the fixing portion 15 for fixing the upper end portion of the side plate portion 12 and the peripheral edge portion 11b of the top plate portion 11. Have been. A guide inclined portion 12i inclined upward and inward from the upper end of the upper end displacement plate portion 12e is also formed.

As shown in FIGS. 5 to 7, the stepped portion 16 includes a first curved portion 16 a that curves inward from an upper end of the flat plate portion 12 f or the partial cylindrical portion 12 g of the side plate portion 12, and a first curved portion 16 a of the first curved portion 16 a. The second bent portion 16b is bent upward from the upper end.
The upper end displacement plate portion 12e is formed so as to be displaced inward from the flat plate portion 12f and the partial cylindrical portion 12g by about twice the thickness of the peripheral portion 11b of the top plate portion 11. The peripheral edge 11b of the top plate 11 is loosely fitted to the upper end displacement plate 12e so as to cover the upper end displacement plate 12e from the outside, and the peripheral edge 11b of the top plate 11 is displaced at the upper end by a plurality of screws 17. It is fixed to the plate portion 12e.

  As shown in FIG. 4, in each of the four corner portions 12 g of the side plate portion 12, in the partial cylindrical upper end displacement plate portion 12 e, the guiding inclined portion 12 i is omitted, and the partial cylindrical upper end displacement plate portion 12 e is provided. Are formed in the upper end portion thereof such that two V-shaped concave portions 18 protrude inward. These V-shaped recesses 18 are provided for improving the workability of pressing the corner 12g of the side plate portion 12 into a partially cylindrical shape.

  When the packed heat pump unit 1 is vertically stacked and transported, the top plate portion 11 is elastically deformed by a load acting on the top plate portion 11 from above, and the corner portion peripheral edge portion 11br of the top plate portion 11 is deformed. In order to prevent the lower end portion from contacting the step portion 16 in a pressing manner and damaging the coating film, the following notch portion 19 is formed.

  As shown in FIGS. 3, 6, and 7, in each of the four corners 11 r of the top plate 11, a notch 19 is formed at the lower end of the corner peripheral edge 11 br of the top plate 11. . It is desirable that the height H of the notch portion 19 be equal to or greater than the bending radius of the step portion 16 (the bending radius R of the second curved portion 16b) (for example, 2 to 4 mm).

  The notch 19 includes a curved notch 19a formed at the lower end of the corner peripheral edge 11br, and a linear notch 19b linearly extending a predetermined length on both sides of the curved notch 19a. including. The linear notch 19b is formed at the lower end of the flat peripheral portion 11b of the top plate 11. Since the straight notch 19b is formed, it is difficult for the upper end displacement plate 12e of the side plate 12 and the step 16 to be displaced inward in the vicinity of the corner peripheral edge 11br. Since the notch is formed, the coating film at the step is not damaged.

The operation and effect of the outer case 2 described above will be described.
During transportation of the heat pump units 1 stacked in a plurality of stages in a packed state, a load acts on the top plate 11 from above, and the peripheral edge 11b of the top plate 11 is displaced downward due to elastic deformation of the top plate 11. Even if it does, since the notch 19 is formed at the lower end of the corner peripheral edge 11 br of the top plate 11, the lower end of the corner peripheral edge 11 br does not contact the step 16 of the side plate 12, The coating film of the step 16 is not damaged.

  Since the height H of the notch 19 is equal to or greater than the bending radius R of the step 16, even if the horizontal dimension of the step 16 is smaller than the state shown in FIG. Even so, the lower end of the corner peripheral edge 11 br does not contact the step 16 of the side plate 12. Moreover, since the height H of the notch 19 is about 2 to 4 mm, the appearance of the outer case 2 does not deteriorate.

  In particular, the notch 19 has a curved notch 19a formed at the lower end of the corner peripheral portion 11br, and a linear notch extending linearly by a predetermined length on both sides of the curved notch 19a. 19b, even if the upper end displacement plate portion 12e of the side plate portion 12 and the step portion 16 are hard to be displaced inward in the vicinity of the corner peripheral portion 11br, the linear notch portion corresponding to the portion. Since 19b is formed, the coating film of the step portion 16 is not damaged.

  The above embodiment is merely an example, and those skilled in the art can implement various modifications to the embodiment without departing from the spirit of the present invention. Is also included.

1 heat pump unit 2 exterior case (exterior structure)
Reference Signs List 10 Bottom plate part 11 Top plate part 11b Peripheral edge part 11br Corner peripheral part 12 Side plate part 12e Upper end displacement plate part 15 Fixed part 16 Step part 19 Notch part 19a Curved notch part 19b Linear notch part

Claims (3)

Exterior structure of a heat pump unit formed in a box shape from a tray-shaped bottom plate opening upward, a tray-like top plate opening downward, and a side plate connecting the bottom plate and the top plate. And
A fixing portion for fixing an upper end portion of the side plate portion and a peripheral portion of the top plate portion is provided with an upper end displacement plate portion in which an upper end portion of the side plate portion is displaced inward via a step portion. A heat pump unit, wherein a peripheral portion of the plate portion is formed so as to cover the upper end displacement plate portion from outside, and a cutout portion is formed at a lower end portion of a corner peripheral portion of the top plate portion. Exterior structure.   The exterior structure of the heat pump unit according to claim 1, wherein a height of the notch is equal to or greater than a bending radius of the step.   The exterior structure of a heat pump unit according to claim 1, wherein the notch is formed to extend by a predetermined length on both sides of the peripheral edge of the corner.